Door latch



Dec. 19,1922.

Nunn

Br www f5,

Mmm/frs ranma nee. is, resa.

viens J. winnaars, or' cnrcaeo, rtiiinors.

i ,Doon ration.

Application filed. Janna'ryl, `1921;` Seria1i N024L295".

To all yw lio/mit may concern' Be it known that l, Vieni: J. liiLLIAiusyal citizen oi the United States, and a resident of the city 'of Chicago, in the county oi @ook and State of illinois, have invented a new and useful improvement in Boor Latches,

of which the tollowing'is artull, clear,` yand exact description.

My invention relates to improvements in door latches, and it co-nsists'in the combinan tions, constructions and arrangements herein described and claimed.' i

An object'of my invention is to provide a door ylatch of relat-ively simple construction, which may be operated by pushing or pulling on the knob, instead ot rotating the latter.

A 'further object ot my invention is to provide a latch ot t-he type described which, when applied to a door, will permit the latter to open when the knob is pushed toward the door, as, tor instance, in a crowded theater' in which a panic has taken place", thus obviating` the necessity of turning the'knob.

A further object of my invention is to provide a device et the type described which is positive in action, and which is not liable to easily get out of order.l

Other objects and advantages will appear in the 'following speciiication, and the novel `features of the invention will be partc-ularly.

pointed out in the appended claims.

lvly invention is illustrated in the accompanying drawings, forming part of this application, in whichj Figure -1 isa sectional view on the line 1 1 ot Figure 2, looking in the direction ot the arrow, and

Figure 2 is a 2 2 ot Figure 1, looking in the direction of the arrow. l

ln carrying` out my invention, l provide a metal casing 1, having` a front flange 2 which may be made integral with the casing, or may be secured to it. They iiange 2 is pro- `vided with the usual bolt opening 3, and

also with openings to permit screws'l-y to enter the door 5, which is mortised in the ordinary` manner to receive the `latch cas-v ing 1.

Arranged to entend through the bolt opening 3 is the latch bolt 6. The latter has a beveled end' portion 7 and is slotted at 8 and 9 in the manner shown in Figure 1. spring 10 bea-rsr at one end on that `portion ot the bolt at-the end ofthe slot 8, the other end of the spring being secured to a post sectional view on the line 11 carried by" thek easing 1. The spring 10 normally tends to v"torce the bolt forwardly.

ln Fiz'gure 1, l have vshown/the bolt in the ieeess12 inthey door amb 13," a'strike plate l11i-oi" ordinary construction being used.'VVK

vArranged4 toslide transversely with re' spect tothe casing isa shank 15, which is provided on itsends with1knobs`16 yanelli".y This shank may -be ,guided by plates 18`secured vto the door, and is provided with a cam member 19 Iarranged to engage-'thebolt y at the rear wall ot the slot9j The door 5 khas a recess' portion'20 arrangedtoreoeive the cam member 19. l

From the foregoing description of the various parts of the device, the operation thereof may be readilyiunderertoodt The door 5 is mortised in the manner stated, and the latch casing is inserted.y The knobs 16 and 17 are removablel trom theshank, inv order to permit the latter `to pass through the guide platestl.y wWhen theparts are in the position shown in Figure 2, it is vonly necessary to pull on the knob 16 to open the dooigsince the shank 15 will slide in the direction ot the pull, and the cani member 19 will force the bolt rearwardly against the tension of the spring'l'Ountil the outer edge of the bolt has cleared'the strike plate 14, when the door' will open.- Obviously, -the same result could be obtained by pushing on the knob 17. it must be seen that all that is necessary is to exert a torce toward or away` from the door, i. e., a pushing or `pulling torce, to openthe door.v Immediately on release et the knob, thespring 10 will torce the bolt into position toengage the strike plate, the cam member 19 assuming the norf mal i l Yam aware that thel movement of latch devices by 'cams is not broadly new. Such, however, is not my invention. y

I claim: f s 1.` ln a latch, a casing having an opening,

position shown in Figure 2.

-a latch bolt slidably disposed within the casa cam member carried by said shank and arranged to engage the lraaafwa-ll ot said last named slot in said latch bolt, knobs carried b vsaid shank7 and guide members for guid ing the movement oi said shank in a direction at right angles to the plane of .movement of the latch bolt. y

2. ln a latch, a casing having an opening, a latch bolt slidably disposed Within the casing and adapted to extend through said opening, said latch bolt being provided with" slots, a spring disposed in,one of said slots and arranged to bear against a portion of said latch bolt, a pin carried by said casing and having connection With said spring, a shank arranged to passthrough 'another of said slots in,` said latch bolt, a cam member carried by said shank andl arranged to engage a portion oi' said latch bolt-r said cam member being arranged to extend .laterally of said shank and being fashioned with a beveled outer face, knobs carriedy by said shank, and guide members for guiding the movement of said shank in a direction at of said springa a shank disposed through the remaining slot in said bolt transverse-ly therethrough and slidably mounted in said casing', a cam member carried by said shank and arranged to engage therear Wall oi said last named slot when said shank is moved longitudinally and knobs'disposed on the opposite ends orf said shank.y

VIGER J. XVILLIAMS. 

